Improvement in devices for aiding combustion in steam-boiler and other furnaces



w. s. HUTCHINSON.

DEVICE FOR Alums comausnon 11 STEAM-BOILER. AND 0mm FURNACES.

19Z,168-, Patented June 19, 1 877.

WKmQaQs Q mmmx w n Wit/u wi -M54w/wc m/ N.PE|ERS, PHDTQ-LITHOGRAPHER, WASHINGTONv 3. C-

UNITED STATES WILLIAM S. HUTGHINSON, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN DEVICES FOR AIDING COMBUSTION IN STEAM-BOILER AND OTHER FURNACES.

Specification forming part of Letters Patent No. 192,168, dated J une 19, 1877 application filed March 20, 1877.

To all whom it may concern:

Be it known that 1, WILLIAM S.'HUTGHIN- SON, of Chicago, county of Cook, State of Illinois, have invented or discovered a new and useful Improvement in Steam-Boiler and other Heating Furnaces; and I do hereby declare the following to be a full, clear, concise, and exact description thereof, reference bein g had tothe accompanyingdrawing, making a partof this specificatiomin which-like letters indicating like parts- 3 Figure- 1 is a longitudinal vertical section of a steam-boiler furnace, illustrating the application of my improvements thereto. Fig. 2 is a longitudinal horizontal section thereof just below the boilers, and Fig. 3 is an en" larged sectional view of one of the steam-jets with its immediate connections. a

-My improvement is designed to facilitate and perfect the combustion of the fuel ordinarily employed for heating purposes, in connection with steam-boilers, metallurgic furnaces, or the lire-chambers of other heating apparatus where steam is or caube made accessible.

For convenience of illustration I have shown it as applied to an. ordinary flue-boiler; and from my description, taken in connection with the drawing, those skilled in this art will be able to apply the same improvements to other fire-chambers and furnaces generally.

B represents an ordinary i'lue-boiler,inounted on the usual inclosing-walls B. A is an ordinary fire-chamber; a, the grate-bars, and]; the lire-bridge wall. Immediately over the door a, and projecting forward any desired distance into the fire-chamber A, so as to be heatedtherefrom, is a transverse chamber, D, along which I run a steam-pipe, d, which leads from the boiler or otherconvenient steam-generator. A cock or valve to cutoff, let on, and regulate the supply of steam, is arranged at d and a blow-off cock at 01 In the wall of the chamber D next the fire I make a series of openings, and line the same with air-inlet tubes or thimbles e, so made that air may pass freely through their open base ends, or

through open lateral ports 0, and thence into the fire-chamber. A steam-jet tube, 8,

leads from the steam-pipe d into each wallopening, or into its thimble e, as more clearly shown in Fig. 3, in such manner that the steam-jet escaping therefrom shall induce a current or flow of air into the fire ehamber, and at about such level that the commingled steam and air so entering the fire-chamber shall be intermixed with the heated smoke, gases of combustion, 850., given oli' from the fire on the grate-bars, and, by supplying the necessary amountof heated oxygen, promote their combustion. The air, passing into the chamber D by the openings 0 and along the heated walls of the chamber, will take up heat therefrom, and also from the steam-pipes, and from the steam itself, with which it intermixed on entering the fire-chamber.

My present improvement relates more particularly to the construction shown in Fig. 3, where the thimble e is screwed directly to the T-coupling a, the open ends of the T being the air-supply ports. The T-coupling n is tapped at the prolongation of the axis of the thimble e, and the jet-tube is screwed therein, and the base end of the jet-tube, by another T-couplin g, n, is secured to the steam-pipe d. This construction enables me to make and fit up this part of the apparatus complete at the machine-shop, so that it can be placed in position in the chamber D, and the inside vertical wall of the chamber be built up over and around the thimbles.

I claim herein as my invention- The combination of thimble e, T-coupling n, jet-tube s, T-coupling n, and pipe at, as a devicecomplete for being built into the wall of the chamber D, arranged for the injection of air and steam into the furnace, substantially as set forth.

In testimony whereof I have hereunto set my hand.

WILLIAM S. HU'IGHI'NSON.

PATENT OFFICE. 

